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<h1 class="topictitle1">创建文件扩展名过滤规则</h1>
<div><p>系统预置了已知勒索文件扩展名，如果需要新增，请参考本节操作。</p>
<div class="section"><h4 class="sectiontitle">操作步骤</h4><ol><li><span>在导航栏选择“数据安全 &gt; 防勒索 &gt; 文件拦截”。</span></li><li><span>单击<span class="uicontrol">“创建”</span>。</span><p><p>系统右侧弹出“创建文件扩展名过滤规则”对话框。</p>
<p><span><img src="zh-cn_image_0000002079002621.png" width="388.02750000000003" height="165.15607500000002"></span></p>
<p></p>
</p></li><li><span>设置文件扩展名过滤规则的参数。</span><p><p>相关参数如<a href="#ZH-CN_TOPIC_0000002042963184__table373910544193">表1</a>所示。</p>

<div class="tablenoborder"><a name="ZH-CN_TOPIC_0000002042963184__table373910544193"></a><a name="table373910544193"></a><table cellpadding="4" cellspacing="0" summary="" id="ZH-CN_TOPIC_0000002042963184__table373910544193" frame="border" border="1" rules="all"><caption><b>表1 </b>文件扩展名过滤规则参数</caption><colgroup><col style="width:22.1%"><col style="width:77.9%"></colgroup><thead align="left"><tr><th align="left" class="cellrowborder" valign="top" width="22.1%" id="mcps1.3.2.2.3.2.2.2.3.1.1"><p>参数名称</p>
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<th align="left" class="cellrowborder" valign="top" width="77.9%" id="mcps1.3.2.2.3.2.2.2.3.1.2"><p>参数说明</p>
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<tbody><tr><td class="cellrowborder" valign="top" width="22.1%" headers="mcps1.3.2.2.3.2.2.2.3.1.1 "><p>拦截文件扩展名</p>
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<td class="cellrowborder" valign="top" width="77.9%" headers="mcps1.3.2.2.3.2.2.2.3.1.2 "><p>拦截文件的扩展名。支持填写一个或多个拦截文件扩展名。</p>
<p>[取值范围]</p>
<ul><li>长度为1～127个字符。</li><li>文件扩展名只能由数字、字母、空格或特殊字符（!"#$%&amp;'()*+,-./:;&lt;=&gt;?@[\]^_`{|}~）组成，支持通配符"?"和"*"，且通配符"*"只能位于最后一个字符。如：T?X或者Tx*。</li><li>多个文件扩展名请以","分隔。<p>[示例]</p>
<p>txt,docx,xlsx</p>
</li></ul>
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<tr><td class="cellrowborder" valign="top" width="22.1%" headers="mcps1.3.2.2.3.2.2.2.3.1.1 "><p>关联租户</p>
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<td class="cellrowborder" valign="top" width="77.9%" headers="mcps1.3.2.2.3.2.2.2.3.1.2 "><p>选择是否关联租户。</p>
<ul><li>开关关闭：只创建文件扩展名过滤规则，不关联租户。</li><li>开关打开：创建文件扩展名过滤规则并在租户列表中勾选要关联的租户。</li></ul>
<div class="note"><span class="notetitle"> 说明： </span><div class="notebody"><p>系统预置的文件扩展名过滤规则默认关联系统当前的所有租户。</p>
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</p></li><li><span>单击<span class="uicontrol">“确定”</span>。</span></li></ol>
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